【摘要】：試驗旨在研究不同β-受體激動劑添加模式對肉牛血液生化指標和激素水平的影響。選取15頭體況良好、體重相近(257.9kg±33.3kg)的西門塔爾肉牛,隨機分為3組,每組5頭。對照組飼喂基礎日糧;試驗Ⅰ組添加萊克多巴胺,添加劑量為670.0μg/kg體重;試驗Ⅱ組添加萊克多巴胺、沙丁胺醇和克倫特羅的混合物,添加劑量分別為223.3、50.0、5.3μg/kg體重。給藥期28d,停藥期28d。結果表明,與對照組相比,在給藥第28天時,試驗Ⅰ組肉牛血漿中游離脂肪酸(FFA)濃度顯著降低(P0.05),試驗Ⅱ組肉牛血漿中葡萄糖(GLU)和游離脂肪酸濃度均顯著降低(P0.05);整個試驗過程中,除停藥第28天時試驗Ⅰ組肉牛血漿中胰島素(INS)水平顯著高于對照組外(P0.05),β-受體激動劑對各試驗組血漿中激素水平均無顯著影響(P0.05)。綜合上述試驗結果,肉牛血漿中的FFA可作為β-受體激動劑潛在的生物標志物,可通過對其的監(jiān)測來監(jiān)管β-受體激動劑在肉牛生產環(huán)節(jié)中的非法使用。
[Abstract]:The aim of this study was to study the effects of different 尾-agonist supplementation patterns on blood biochemical indexes and hormone levels in beef cattle. Fifteen Simmental beef cattle with good body condition and similar body weight (257.9kg 鹵33.3kg) were randomly divided into 3 groups with 5 heads in each group. The control group was fed basic diet, the control group was fed with ractopamine at a dose of 670.0 渭 g/kg body weight, and the experimental group 鈪，

本文編號：2170557